Any shrub of the genus Philadelphus, particularly Philadelphus coronarius (sweet mock orange).
Bursaria spinosa (Australian blackthorn), a small tree from Australia.
Murraya paniculata (orange jessamine), a small tree ranging from East Asia to Australasia.
Choisya ternata (Mexican orange), an aromatic shrub native to North America.
Maclura pomifera (Osage orange), a small tree from North America.
Pittosporum undulatum (sweet pittosporum), a small tree native to Australia.
Hence any of several flowering plants of the genus Philadelphus, such as now in the Western United States Philadelphus lewisii.
Any of several flowering plants, of the genus Syringa, such as the lilacs.